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Finding the Fourth Proportional to 561,345.44, 774,647.60 and 306,691.12

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Solution

The fourth proportional to 561,345.44, 774,647.60 and 306,691.12 is: 423,228.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,345.44 : 774,647.60 = 306,691.12 : x
  2. Step 2: Convert to fraction form
    561,345.44/774,647.60 = 306,691.12/x
  3. Step 3: Cross multiply
    561,345.44x = 774,647.60 × 306,691.12
  4. Step 4: Simplify right side
    561,345.44x = 237,577,540,049.31
  5. Step 5: Solve for x
    x = 237,577,540,049.31/561,345.44
  6. Step 6: Final answer
    x = 423,228.77

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.